Merge pull request gfx-rs#29 from kvark/output

Frame abstraction

src/factory.rs

@@ -18,10 +18,12 @@ use std::rc::Rc;
 use std::slice;
 
 use {gl, tex};
+use gfx;
 use gfx::device as d;
 use gfx::device::handle;
 use gfx::device::handle::Producer;
 use gfx::device::mapping::Builder;
+use gfx::tex::Size;
 
 use Buffer;
 use Resources as R;
@@ -43,6 +45,27 @@ pub fn update_sub_buffer(gl: &gl::Gl, buffer: Buffer, address: *const u8,
     }
 }
 
+/// A placeholder for a real `Output` implemented by your window.
+pub struct Output {
+    width: Size,
+    height: Size,
+    handle: handle::FrameBuffer<R>,
+}
+
+impl gfx::Output<R> for Output {
+    fn get_handle(&self) -> Option<&handle::FrameBuffer<R>> {
+        Some(&self.handle)
+    }
+
+    fn get_size(&self) -> (Size, Size) {
+        (self.width, self.height)
+    }
+
+    fn get_mask(&self) -> gfx::Mask {
+        gfx::COLOR | gfx::DEPTH | gfx::STENCIL
+    }
+}
+
 /// GL resource factory.
 pub struct Factory {
     caps: d::Capabilities,
@@ -94,6 +117,18 @@ impl Factory {
             );
         }
     }
+
+    pub fn get_main_frame_buffer(&self) -> handle::FrameBuffer<R> {
+        self.main_fbo.clone()
+    }
+
+    pub fn make_fake_output(&self, w: Size, h: Size) -> Output {
+        Output {
+            width: w,
+            height: h,
+            handle: self.main_fbo.clone(),
+        }
+    }
 }
 
 
@@ -236,10 +271,6 @@ impl d::Factory<R> for Factory {
         self.handles.make_sampler(sam, info)
     }
 
-    fn get_main_frame_buffer(&self) -> handle::FrameBuffer<R> {
-        self.main_fbo.clone()
-    }
-
     fn update_buffer_raw(&mut self, buffer: &handle::RawBuffer<R>,
                          data: &[u8], offset_bytes: usize) {
         debug_assert!(offset_bytes + data.len() <= buffer.get_info().size);

src/lib.rs

@@ -33,7 +33,7 @@ use gfx::device::handle;
 use gfx::device::state::{CullFace, RasterMethod, FrontFace};
 
 pub use self::draw::{Command, CommandBuffer};
-pub use self::factory::Factory;
+pub use self::factory::{Factory, Output};
 pub use self::info::{Info, PlatformName, Version};
 
 mod draw;